Question

A: Decreases
to
Is a metal in period 2 having electronic configuration 2,1. [Beryllium/Lithium/Sodium]
3. Is a period having elements from atomic no. 11 to 18. [period - 1/2/3]
4.
The most reactive halogen from group 17. [chlorine/fluorine/bromine]
5. Is the group number of the element whose atomic number is 4. [ group-1/ group - 2/ group -18].
10.2 Fill in the blanks from the words A to F given below.
[5]
B: Increases
C: Remains same D: Increases by one
E: Electropositive F: Electronegative
1. Across a period from left to right in the Modern Periodic Table.
No. of electron shells _ ;
-; No. of valence electrons _ ;
Electronegativity _ ;
Character of elements changes from _ to _ .
2. Down a group in the Modern Periodic Table.
No. of electron shells --_--; No. of valence electrons _ ;
Electronegativity _ ;
Character of elements changes from _ to _ .​

Answer 1

Answer:

I think beryllium

Explanation:

I am not sure that this answer is correct or not

Answer 2

Answer:

lithium is the correct answer